Liquid fuel vaporizer and burner



ZMSLMW C. A. FRENCH Filed June 15,

LIQUID FUEL VAPORIZER AND BURNER Patented Feb. 18, 1936 2,031,306

warren STATES PATENT oFFIeE LIQUID FUEL VAPORIZER AND BURNER Charles A. French, Riverside, Ill. Application June 15, 1933, Serial No. 675,934 Claims. (01. 15853) This invention relates to a liquid hydro-carbon the region of the burner to the intake of a centrifvaporizer and burner. ugal fan M. The fan I4 is also provided with an The principal object of the invention is to proair intake IS. The outlet of the fan extends to a vide an improved vaporizer adapted to utilize the conduit or pipe I 6, which joins a housing ll. The

,-, heavier hydro-carbon fuels. housing I? surrounds the lower portion of the Another object is to provide a burner in which vaporizing casing and is provided with a tavaporization is initiated by partial combustion pering outlet passage I8, which registers with and continued by contact with the fuel to be the upper surface of the burner grating 8. A vaporized with a portion of the hot products of firing tube or conduit I9 extends into the burner 1 complete combustion. casing below the grating 8. At its outer end 10 This method and apparatus for carrying it out the tube I9 is provided with a bent portion 20 is described and claimed in my co-pending ap'pliwhich extends into the conduit 13. A flared end cation Serial No. 399,685, filed October 14, 1929, 2| on the bent portion 29 extends into the path this application disclosing a modification. of gas flow in the conduit I3 in a direction op- 13 Another object is to provide means for igniting posite to the direction of the gas flow. A spark 15 the main burner when vaporization has been plug 22 is inserted into the firing tube I9. A continued by the initial vaporizing means long second tube or conduit 23 extends from the conenough to supply combustible products for the duit I6 into the firing tube 59. Within the conmain burner. duit Hi, the tube 29 is provided with a flared in- The drawing shows a diagrammatic sectional let 24 facing opposite the direction of gas flow. At 20 view of a device embodying the invention. A the other end, a restricted outlet 23' is positioned closed vaporizing chamber I is provided at the centrally in the firing tube 59 forming a forcing top with a distributing rotor 2. The rotor connozzle when pressure in the conduit 23 is in exsists of a hollow shaft 3, a pulley 4 by which the cess of the pressure in the conduit I9.

: rotor is driven, and a dished distributing disk 5. In the operation of this vaporizer and burner, 25 The disk 5 is mounted at the lower end of the liquid fuel is delivered in regulated amounts rotor within the vaporizing chamber and closes through a pipe 26 into the hollow shaft 3 of the the lower end of the hollow shaft. Small ducts 6 rotor. The fuel passes through the duct 5 onto are provided for distributing oil to the upper the disk 5 and is delivered from the edges in a 39 surface of the disk. The lower portion of the finely divided form. By means of a spark plug 30 vaporizing chamber is in the form of a section 27, the finely divided spray is ignited in the of a cone and extends downwardly into contact vaporizing chamber I. The fan M is put into with a central opening I in a perforated burner operation, air is forced through the conduit I6 grating 8. Said grating is fitted over a convenand the housing I! to the burner grating 8.

tional combustion chamber 28, a portion of which Due to pressure built up on the flame side of the is shown extending downwardly from the gratgrating, air passes upwardly between the lower ing. A centrally positioned conduit 9 extends wall of the vaporizing chamber and the conduit from below the burner grating upwardly into the 9. Combustion takes place in the vaporizing vaporizing chamber. The conduit 9 and the chamber whereby a portion of the oil is burned lower wall of the vaporizing chamber form an and the remainder is vaporized by the heat of annular passage-way for gases from the flame such partial combustion and by the sensible heat side of the burner grating into the vaporizing of the gases. The partial combustion and vaporchamber. A conical baffle member I0 attached ization products pass around the bafiies I0 and to the conduit 9 extends in spaced relation to the II, to the conduits 9 and I3, to the intake of the wall of the vaporizing chamber, forming a narfan. Such products are mixed with air in the row annular passage therebetween. A cap-like fan, which forms an effective mixing means, and bafile member I! is positioned over the upper delivered through the burner grating. The rich end of the conduit 9 to provide a tortuous path products of combustion passing through the confor gases leaving the vaporizing chamber. duit I3 strike against the enlarged end 2| of the At the lower end of the conduit 9, a radially ignition tube and pass into said tube. The prod- 50 extending flange I2 is positioned a short disucts from the fan strike against the enlarged end tance below the burner grating. The outer pe- 24 of the tube 23 with a greater pressure than is riphery of the flange is upturned. A conduit or existing in the conduit I3. It will, therefore, be pipe l3 attached to the lower end of the conduit understood that gas s will pass throu h the 5 9 b low the flange I2 extends outwardly from restricted outlet 25 WIT/1.17 an m ector action whereby the rich vaporization products from the conduit l3 are entrained and forced through the ignition tube l9. This rich combustible mixture is ignited by the spark plug 22, whereby a blast is formed, which is projected into the burner casing below the grating. Combustion is then initiated at the main burner.

After the main burner is in operation, the gases being drawn up into the vaporizing chamber are no longer combustible. It is, therefore, evident that combustion will cease in the vaporizing chamber, vaporization being continued thereafter by sensible heat from the hot complete combustion products.

It is to be understood that applicant has shown only a preferred embodiment of his device and that he claims as his invention all modifications thereof falling within the scope of the appended claims.

What is claimed is:

1. A liquid fuel vaporizer and burner comprising a vaporizing chamber, means to distribute liquid therein, a burner grating, means for delivering hot burned gases from the flame side of the grating to the vaporizing chamber, gas and air mixing and moving means, means for delivering gases from the vaporization chamber to said means, means for conducting gases from the mixing and moving means to the burner grating, igniting means for the burner grating consisting of a conduit positioned to receive gases from the means for delivering gases from the vaporizing chamber to the mixing and moving means and to deliver said gases to the flame side of the grating, a conduit positioned to receive gases from the means for conducting gases to the burner grating and extending into the first named conduit, and an igniting device positioned in said first named conduit.

2. A liquid fuel vaporizer and burner comprising a vaporizing chamber, means to distribute liquid therein, a burner grating, means for delivering hot burned gases from the flame side of the grating to the vaporizing chamber, gas and air mixing and moving means, means for supplying air thereto, a supply pipe leading from the vaporization chamber to the mixing means, a delivery pipe leading from the mixing means to the grating, igniting means for the burner grating consisting of a conduit positioned to receive gases from the supply pipe and to deliver said gases to the flame side of the grating, a conduit positioned to receive gases from the delivery pipe and extending into the first named conduit, and an igniting device positioned in said first named conduit.

3. An igniting structure for a hydro-carbon vaporizer and burner containing a combustion chamber, a supply pipe for carrying a rich combustible gas and a delivery pipe for carrying said gas after it is mixed with air for combustion and in combination therewith a conduit having an open end positioned in the supply pipe and extending into the combustion chamber of the burner, a second conduit having an open end in the delivery pipe and extending into said last mentioned conduit, and means positioned to ignite the gases in the first mentioned conduit.

4. An igniting structure for a hydro-carbon k vaporizer and burner containing a combustion chamber, a supply pipe for carrying a rich combustible gas and a delivery pipe for carrying under pressure said gas after it is mixed with air for combustion and in combination therewith a. conduit having an open end positioned in the supply pipe and extending into the combustion chamber of the burner, a second conduit having an open end in the delivery pipe and extending into said last mentioned conduit, said second conduit terminating in a forcing nozzle whereby rich gas is drawn from the supply pipe through the first mentioned conduit, and means positioned to ignite the gases in said first mentioned conduit.

5. An igniting structure for a hydro-carbon vaporizer and burner containing a combustion chamber, a conduit for carrying a rich combustible gas and a conduit for carrying said gas after it is mixed with air sufficient for combustion and in combination therewith a conduit having an open end positioned in the conduit carrying the rich combustible gas and extending into the combustion chamber of the burner, a second conduit having an open end in the conduit for carrying the mixed gas and air and extending into said last mentioned conduit, and means positioned to ignite the gases in the conduit extending into the combustion zone.

CHARLES A. FRENCH. 

